ABUS Rock 83CS/55mm closed shackle heavy-duty fully re-keyable through hardened steel alloy padlock, with a ball bearing locking mechanism for extra security, has a tough through hardened steel alloy shackle as standard with NANO PROTECT™ Chrome Plating, helping to make rusty shackles a thing of the past. Can be adjusted to operate key retaining or no key retaining, automatic locking or key to lock. Where to use: The 83 series range of padlocks offer a medium to high level of security, with the ability to offer various levels of security within one keying system and is suitable for internal or external use.Width : 55mmHeight : 92.5mmDepth : 25mm Shackel Width : 24.5mmShackle Height : 27.5mmShackle Diameter : 11.5mmSecurity Level : 8